In a recent incident, NYU student Dejian Zeng went undercover to get an inside look of Apple’s manufacturing factories and let us know details that we would probably never ever find out. The atmosphere inside these factories is very different from what we might think. Workers have to work long hours to meet the demands of Apple’s customers, live in factory dorms and carry out intricate work by hand.

However, one piece of information that was detailed by Zeng was the security measures Apple implements at their factories. The production of new products start months in advance and it has always been Apple’s mission to prevent leaks before the eventual launch of an iPhone every year.

Zeng spoke with Business Insider and described the kind of procedures that are in place to prevent such leaks. He said “We have a locker room. That’s where workers changed their clothes; put their phones, their keys, all their metals. We need to swipe our card, and they have facial recognition. After you get in, you wait in line to go through a metal detector. But that was during the time that I was producing the iPhone 6s. When I was producing the iPhone 7, they increased their security level. There were two metal detectors in the factories, and they also increased the sensitivity of the machines. Like, for example, some girls have some bras that have metals in it. All of a sudden, on that specific day, they couldn’t pass the security door, and they needed to go back and change everything. Inside the factories, any kind of metal is not allowed. So I don’t think anybody can bring a camera or something like that inside of the factories.”

According to Zeng, there are employees such as managers who are allowed to bring phones to the workplace. However, the security measures are so stringent that even they have to prove whether they are trying to smuggle out a future product or not.

iPhone leaks have been the centre of attention the moment a new iPhone is announced. We are all obsessed about the next one and how Apple might change a few things. Last year, the absence of the headphone jack was leaked way in advance.